ATP is used inside a living cell. Injecting ATP into the body - say into the bloodstream - does not put in inside the cell, and so it cannot be used. In fact, I suspect that any significant amount of ATP injected would prove quite toxic.

ATP is used inside a living cell. Injecting ATP into the body - say into the bloodstream - does not put in inside the cell, and so it cannot be used. In fact, I suspect that any significant amount of ATP injected would prove quite toxic.

suppose it will make its way to cell membrane and will pass inside easily. and will be shifted to mitochondria and will be burnt easily to provide energy. then what?